I don't really care about the octane rating nearly as much as the fact that most or all 89oct. mid-grade gas has 10% alcohol in it. I know I'll catch a lot of flack from farmers that raise corn for alcohol, but alcohol will wash or clean up a lot of things, including some things you don't want cleaned.
In addition, "gas/alky" mix is not as efficient as gasoline so you burn more. I have tried it in cars and mileage dropped to the point that hihg grade was cheaper to run. Had a '98 Linc. Cont. for 10 years that got 25+ hwy. with high oct. and it dropped to 22+ with 89 mix. Didn't take me too long to figure out it wasn't worth it.
As to the octane rating, I think you are all on the same page with the mid-grade actually being 93 oct. R method, but don't want to admit it. BTW, I burn 87 in my 240U, but do not work it hard, so don't see a problem.
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Today's Featured Article - Maintaining Rubber Tires - by Staff. The broad use of rubber tires on farm tractors and machinery has resulted in a great saving in both time and operating costs since the time of steel wheels. There are, however, certain basic fundamentals in the care of tires that should be followed carefully if the owner is to derive maximum benefit from his or her investment. First and most important is to maintain proper pressure for the work at hand. Your best guide to proper inflation is the operator's manual or instruction book tha
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